Means for receiving waves of an order of one meter and one decimeter



F. SCHROTER 1,866,271

MEANS FOR RECEIVING WAVES OF AN ORDER OF ONE METER AND ONE DECIMETER July 5, 1932.

Filed April 5. 1930 l l I l I l l I l I l I INVENTOR CHRb TER BY M 9 FRITZ 5 ATTORNEY Patented July 5, 1

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FUR DRAH'I'LOSE TELEGRA GERMANY MEANS FOR Applicationflled April 5, 1930, Serial No.

BERLIN,

rangement for waves 0 f an order of 1 meter or 1 decimeter has been disclosed which comrises aradio frequency collective receiver outfit favorably positioned with reference to the radiation field and from which the signal and communication frequencies distributed to the varlous demodulation are obtained by individual sets or consuming points.

The present invention plifies the construction a collective receiver in and mounting of such that the tube for demodulation and regeneration (reduction of damping) is not inserted directly in the-receiver dipole (which is mostly located at relatively great height and is therefore difficulty accessible) but is connected therewith (or with a plurality of electrically associated d1- rectionally acting receiver dipoles optionally in combination with what is known as a wire. paratus comprising can be accommodated reflectors) by means of radio frequency feed In this manner the part of the apand working with tubes at a better protected and morereadily accessible point of the installation so that the operation and replacement of the tube is made easier.

Since feed wires or coming lines of the kind here into consideration as well-known in the art of short-wave communication may have several timesthelength of the waves to be handled without the losses becoming unduly high,

the adoption of centralized reception by the use of such an energy feed line is substantially simplified in practice.

The accompanying drawing illustrates the.

basic idea ofthe invention by means of an executional example.

Referring to the drawing, 1 is the dipole oscillating within a reflector 2 of any desire type, though both may rality of unit dipoles phase relation. The radio frequency energy is taken ofi by means 0 be replaced by a pluoscillating in proper f coupling loop 3 and facilitates or Sim-- GERMANY, nssrenon 'ro zrnnnruiwxim ens'nnnscnu'r PHIE m. B. H.,

O]? BERLIN, GERMANY, A. CORPORATION OF RECEIVING- WAVES 0F AN ORDER OF ONE METER.AND ONE DEOIMETER 441,976, and in Germany April 25,1929.

is fed by way of feed line 4: and coupling means 5 to the thermionic tube 6. The signal frequency obtained from'the latter by demodulation, suitably after additional amplification, is then impressed upon the distribution line. As regards tuning, adaptation of the surge impedance, and construction of the feed wire, the same rules hold good as known from the radio art. For the object of tuning, a part 7 8, of the energy line may be made symmetrically adjustable inits position.

This is accomplished by varying the length or size of the conductors or leads from coupling 3 extending within or parallel with or adjacent the members 7 and 8 thereby varying the capacity coupling between the line and the circuit 5, and coupling said line to thermionic tube 6.

I claim:

1. In a receiving adapted to receive'waves of less than one meter, a reflector, a dipole adjacent said reflector, an energy-feed line coupled to said dipole, a-space discharge device circuit having its input circuit coupled to said feed line and means for symmetrically adjusting said feed line for tuning the circuit.

2. An arrangement as claimed in claim 1 including a shield enclosing said feed line.

3. In radio apparatus for the transmission of electrical energy by means of high frequency oscillations of a wave length less than one meter, a member adapted to effect interchange of high frequency oscillations with a natural medium, a thermionic relay circuit, a feed line comprising circuit arrangement I leads enclosed in a] end of said feed line and said interchange member, and a coupling of variable capacity d between the other end of said lead lines and the electrodes in said thermionic relay.

4. In radio apparatus for the transmission of electrical energy by means of high frequency oscillations of a wave length less than one meter, a member adapted to effect interchange of hi h frequency oscillations with a natural me 'um, a relay, a feed line including parallel conductors, shielding means for said feed line, means for inductively coupling said feedline tosaid radiant ener interc ange member at one end, a varia le capacity in each of said leads, and means for inductively coupling the other end of said feed line to said relay.

FRITZ SCHROTER. 

